diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 9e7744eb57a3..fed9dfdfcc3b 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -2070,6 +2070,7 @@ static ssize_t tun_put_user(struct tun_struct *tun,
 		struct virtio_net_hdr_v1_hash_tunnel hdr;
 		struct virtio_net_hdr *gso;
 
+		memset(&hdr, 0, sizeof(hdr));
 		ret = tun_vnet_hdr_tnl_from_skb(tun->flags, tun->dev, skb,
 						&hdr);
 		if (ret)